U.S. patent application number 16/992321 was filed with the patent office on 2021-07-15 for electrical connector.
The applicant listed for this patent is LOTES CO., LTD. Invention is credited to Chang Wei Ke, Jie Liao, Lei Wan, Jun Kang Zhong.
Application Number | 20210218191 16/992321 |
Document ID | / |
Family ID | 1000005049011 |
Filed Date | 2021-07-15 |
United States Patent
Application |
20210218191 |
Kind Code |
A1 |
Liao; Jie ; et al. |
July 15, 2021 |
ELECTRICAL CONNECTOR
Abstract
An electrical connector includes an insulating body
accommodating multiple first terminals. The first terminals include
first and second differential signal pairs. No ground terminal is
provided at one side of the first differential signal pair. Both
sides of the second differential signal pair have ground terminals.
The impedance of the first differential signal pair is adjusted by
having a distance between the first differential signal pair and
the first ground terminal less than a distance between the second
differential signal pair and the first ground terminal, or by
having a width of a portion of the first differential signal pair
exposed out of the insulating body greater than a width of a
portion of the second differential signal pair exposed out of the
insulating body, or by having a distance between terminals of the
first differential signal pair less than a distance between
terminals of the second differential signal pair.
Inventors: |
Liao; Jie; (Keelung, TW)
; Wan; Lei; (Keelung, TW) ; Ke; Chang Wei;
(Keelung, TW) ; Zhong; Jun Kang; (Keelung,
TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
LOTES CO., LTD |
Keelung |
|
TW |
|
|
Family ID: |
1000005049011 |
Appl. No.: |
16/992321 |
Filed: |
August 13, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H01R 13/6474 20130101;
H01R 13/6471 20130101; H01R 13/24 20130101; H01R 13/6585
20130101 |
International
Class: |
H01R 13/6471 20060101
H01R013/6471; H01R 13/6474 20060101 H01R013/6474; H01R 13/6585
20060101 H01R013/6585; H01R 13/24 20060101 H01R013/24 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 13, 2020 |
CN |
202010031183.9 |
Claims
1. An electrical connector, comprising: an insulating body; and a
plurality of first terminals, accommodated in the insulating body,
and comprising a first differential signal pair, a second
differential signal pair, and a plurality of first ground
terminals, wherein the first differential signal pair has a first
differential terminal and a second differential terminal, the
second differential signal pair has a third differential terminal
and a fourth differential terminal, the second differential
terminal is closer to the third differential terminal than the
first differential terminal, one of the first ground terminals
exists between and is adjacent to the second differential terminal
and the third differential terminal, no ground terminal is provided
at a side of the first differential terminal away from the second
differential terminal, another one of the first ground terminals is
provided at a side of the fourth differential terminal away from
the third differential terminal, and a distance between the second
differential terminal and the one of the first ground terminals
adjacent thereto is less than a distance between the third
differential terminal and the one of the first ground terminals
adjacent thereto.
2. The electrical connector according to claim 1, wherein each of
the first differential terminal and the second differential
terminal has a first front portion at least partially exposed out
of the insulating body, a first connecting portion connected to the
first front portion and retained to the insulating body, and a
first soldering portion connected to the first connecting portion,
each of the third differential terminal and the fourth differential
terminal has a second front portion at least partially exposed out
of the insulating body, a second connecting portion connected to
the second front portion and retained to the insulating body, and a
second soldering portion connected to the second connecting
portion, and a distance between the first front portion of the
second differential terminal and the one of the first ground
terminals adjacent thereto is less than a distance between the
second front portion of the third differential terminal and the one
of the first ground terminals adjacent thereto.
3. The electrical connector according to claim 2, wherein the first
front portion comprises a first contact portion and a first
extending portion connected to the first contact portion, the first
extending portion is connected to the first connecting portion, the
second front portion comprises a second contact portion and a
second extending portion connected to the second contact portion,
the second extending portion is connected to the second connecting
portion, and a distance between the first extending portion of the
second differential terminal and the one of the first ground
terminals adjacent thereto is less than a distance between the
second extending portion of the third differential terminal and the
one of the first ground terminals adjacent thereto.
4. The electrical connector according to claim 3, wherein a width
of the first extending portion is less than a width of the first
contact portion, a width of the second extending portion is less
than a width of the second contact portion, and the width of the
first extending portion is greater than the width of the second
extending portion.
5. The electrical connector according to claim 3, wherein a chamfer
exists between the first extending portion and the first contact
portion, the width of the first extending portion is 0.6 to 0.9
times the width of the first contact portion, and the width of the
first extending portion is smoothly reduced backward from front
thereof.
6. The electrical connector according to claim 3, wherein a side
edge of the first extending portion close to the one of the first
ground terminals adjacent thereto extends straightly and then
obliquely backward from front thereof.
7. The electrical connector according to claim 2, wherein the
insulating body has a base and a tongue protruding out of the base,
the first terminals are arranged in a row and partially exposed to
an upper surface of the tongue, each of the first front portions is
at least partially exposed to the upper surface of the tongue, at
least some of the second front portions are exposed to the upper
surface of the tongue, the first connecting portion and the second
connecting portion are retained to the base, and a distance between
the two first front portions is less than a distance between the
two second front portions.
8. The electrical connector according to claim 7, wherein the first
front portion comprises a first contact portion and a first
extending portion connected to the first contact portion, the first
extending portion is connected to the first connecting portion, the
second front portion comprises a second contact portion and a
second extending portion connected to the second contact portion,
the second extending portion is connected to the second connecting
portion, the first extending portion extends horizontally backward
from a tail end of the first contact portion, the first connecting
portion bends and extends backward and downward from a tail end of
the first extending portion, the first soldering portion bends and
extends backward from a tail end of the first connecting portion,
the second contact portion and the first contact portion are
located at a same first height of the tongue, the second extending
portion and the first extending portion are located at a same
second height of the tongue, and the second connecting portion and
the second soldering portion respectively overlap with projections
of the first connecting portion and the first soldering portion
along an arrangement direction of the first terminals.
9. The electrical connector according to claim 8, further
comprising a plurality of second terminals, wherein each of the
second terminals is alternately arranged with the first terminals,
the second terminals are arranged in a row and partially exposed to
a lower surface of the tongue, the second terminals comprise two
third differential signal pairs and a plurality of second ground
terminals, each of two sides of each of the third differential
signal pairs is provided with one of the second ground terminals,
each of the third differential signal pairs comprises two fifth
differential terminals, each of the fifth differential terminals
has a third front portion at least partially exposed to the lower
surface of the tongue, a third connecting portion connected to the
third front portion and retained to the base, and a third soldering
portion connected to the third connecting portion, the third front
portions of the two third differential signal pairs are located at
a same height of the tongue, the third connecting portion and the
third soldering portion respectively overlap with projections of
the first connecting portion and the first soldering portion along
the arrangement direction of the first terminals, a distance
between each of the fifth differential terminals and a
corresponding one of the second ground terminals adjacent thereto
is equal to the distance between the third differential terminal
and the one of the first ground terminals adjacent thereto, and is
greater than the distance between the second differential terminal
and the one of the first ground terminals adjacent thereto.
10. The electrical connector according to claim 1, wherein a width
of the first differential terminal is greater than a width of the
fourth differential terminal, or a width of the second differential
terminal is greater than a width of the third differential
terminal.
11. An electrical connector, comprising: an insulating body; and a
plurality of first terminals, accommodated in the insulating body,
and comprising a first differential signal pair, a second
differential signal pair, and a plurality of first ground
terminals, wherein the first differential signal pair has a first
differential terminal and a second differential terminal, the
second differential signal pair has a third differential terminal
and a fourth differential terminal, the second differential
terminal is closer to the third differential terminal than the
first differential terminal, at least one of the first ground
terminals exists between the second differential terminal and the
third differential terminal, no ground terminal is provided at a
side of the first differential terminal away from the second
differential terminal, and another one of the first ground
terminals is provided at a side of the fourth differential terminal
away from the third differential terminal; wherein each of the
first differential terminal and the second differential terminal
has a first front portion at least partially exposed out of the
insulating body, a first connecting portion connected to the first
front portion and retained to the insulating body, and a first
soldering portion connected to the first connecting portion, each
of the third differential terminal and the fourth differential
terminal has a second front portion at least partially exposed out
of the insulating body, a second connecting portion connected to
the second front portion and retained to the insulating body, and a
second soldering portion connected to the second connecting
portion, and a width of a portion of the first front portion of the
second differential terminal exposed out of the insulating body is
greater than a width of a portion of the second front portion of
the third differential terminal exposed out of the insulating
body.
12. The electrical connector according to claim 11, wherein the
first front portion comprises a first contact portion and a first
extending portion connected to the first contact portion, the first
extending portion is connected to the first connecting portion, the
second front portion comprises a second contact portion and a
second extending portion connected to the second contact portion,
the second extending portion is connected to the second connecting
portion, a width of the first extending portion is less than a
width of the first contact portion, a width of the second extending
portion is less than a width of the second contact portion, and a
width of a portion of the first extending portion exposed out of
the insulating body is greater than a width of a portion of the
second extending portion exposed out of the insulating body.
13. The electrical connector according to claim 12, wherein a
chamfer exists between the first extending portion and the first
contact portion, the width of the first extending portion is 0.6 to
0.9 times the width of the first contact portion, and the width of
the first extending portion is smoothly reduced backward from front
thereof.
14. The electrical connector according to claim 12, wherein a
distance between the two first extending portions is less than a
distance between the two second extending portions.
15. An electrical connector, comprising: an insulating body; and a
plurality of first terminals, accommodated in the insulating body,
and comprising a first differential signal pair, a second
differential signal pair, and a plurality of first ground
terminals, wherein one side of the first differential signal pair
is not provided with any ground terminal, the first differential
signal pair has a first differential terminal and a second
differential terminal, each of two sides of the second differential
signal pair is provided with one of the first ground terminals, the
second differential signal pair has a third differential terminal
and a fourth differential terminal, and a distance between the
first differential terminal and the second differential terminal is
less than a distance between the third differential terminal and
the fourth differential terminal.
16. The electrical connector according to claim 15, wherein each of
the first differential terminal and the second differential
terminal has a first front portion at least partially exposed out
of the insulating body, a first connecting portion connected to the
first front portion and retained to the insulating body, and a
first soldering portion connected to the first connecting portion,
each of the third differential terminal and the fourth differential
terminal has a second front portion at least partially exposed out
of the insulating body, a second connecting portion connected to
the second front portion and retained to the insulating body, and a
second soldering portion connected to the second connecting
portion, and a distance between the two first front portions is
less than a distance between the two second front portions.
17. The electrical connector according to claim 16, wherein the
first front portion comprises a first contact portion and a first
extending portion connected to the first contact portion, the first
extending portion is connected to the first connecting portion, the
second front portion comprises a second contact portion and a
second extending portion connected to the second contact portion,
the second extending portion is connected to the second connecting
portion, and a distance between the two first extending portions is
less than a distance between the two second extending portions.
18. The electrical connector according to claim 17, wherein a width
of the first extending portion is less than a width of the first
contact portion, a width of the second extending portion is less
than a width of the second contact portion, and the width of the
first extending portion of the second differential terminal is
greater than the width of the second extending portion of the third
differential terminal.
19. The electrical connector according to claim 17, wherein a
chamfer exists between the first extending portion and the first
contact portion, the width of the first extending portion is 0.6 to
0.9 times the width of the first contact portion, and the width of
the first extending portion is smoothly reduced backward from front
thereof.
20. The electrical connector according to claim 15, wherein the
second differential terminal is closer to the third differential
terminal than the first differential terminal, at least one of the
first ground terminals exists between the second differential
terminal and the third differential terminal, no ground terminal is
provided at a side of the first differential terminal away from the
second differential terminal, another one of the first ground
terminals is provided at a side of the fourth differential terminal
away from the third differential terminal, and a width of the first
differential terminal is greater than a width of the fourth
differential terminal, or a width of the second differential
terminal is greater than a width of the third differential
terminal.
Description
CROSS-REFERENCE TO RELATED PATENT APPLICATION
[0001] This non-provisional application claims priority to and the
benefit of, pursuant to 35 U.S.C. .sctn. 119(a), patent application
Serial No. CN202010031183.9 filed in China on Jan. 13, 2020. The
disclosure of the above application is incorporated herein in its
entirety by reference.
[0002] Some references, which may include patents, patent
applications and various publications, are cited and discussed in
the description of this disclosure. The citation and/or discussion
of such references is provided merely to clarify the description of
the present disclosure and is not an admission that any such
reference is "prior art" to the disclosure described herein. All
references cited and discussed in this specification are
incorporated herein by reference in their entireties and to the
same extent as if each reference were individually incorporated by
reference.
FIELD
[0003] The present invention relates to an electrical connector,
and particularly to an electrical connector transmitting high
frequency signals.
BACKGROUND
[0004] The background description provided herein is for the
purpose of generally presenting the context of the disclosure. Work
of the presently named inventors, to the extent it is described in
this background section, as well as aspects of the description that
may not otherwise qualify as prior art at the time of filing, are
neither expressly nor impliedly admitted as prior art against the
present disclosure.
[0005] HDMI is the abbreviated term of high definition multimedia
interface, which is a digital audio/video interface technology
suited to a dedicated digital interface for video transmission, and
may transmit audio and video signals simultaneously with a highest
digital transmission speed of 48 Gbps (version 2.1). The HDMI
connector before HDMI 2.1 only provides signal transmission
channels of three differential signal pairs, with a highest digital
transmission speed of 36 Gbps. The HDMI 2.1 provides signal
transmission channels of four differential signal pairs, with the
highest digital transmission speed of 48 Gbps. However, one side of
the newly opened differential signal pair is not provided with any
ground terminal, and each of two sides of each of the other three
differential signal pairs is provided with a ground terminal,
resulting in the impedance not matching and not meeting the
standard, and further affecting the transmission speed of HDMI
2.1.
[0006] Currently, to adjust the deficiency of impedance not
matching in the HDMI 2.1, the four differential signal pairs are
all adjusted. The structures of the four differential signal pairs
are provided to be identical to ensure the signal transmission of
the connector is consistent, improving the high frequency
transmission effect, reducing crosstalk, and adjusting impedance.
However, adjusting the four differential signal pairs together does
not make the impedance matching reach the ideal state.
[0007] Alternatively, the impedance of the differential signal pair
may be adjusted by providing an additional grounding member at the
side of the differential signal pair not provided with the ground
terminal, thus matching the impedance of the other three
differential signal pairs, such that the structures of the
differential signal pair and the other three differential signal
pairs are provided to be identical. However, the grounding member
is a component additionally provided, and in design, there is a
need to consider the connection relationships between all
components, the spatial arrangement between all components, and the
high frequency effects, such that the structure of the connector
becomes more complicated, processing and mounting are more
complicated, and the cost is increased.
[0008] Therefore, a heretofore unaddressed need to design a new
electrical connector exists in the art to address the
aforementioned deficiencies and inadequacies.
SUMMARY
[0009] The present invention is directed to an electrical
connector, in which the structure of the differential signal pair
with one side not provided with any ground terminal is adjusted to
be different from the structures of other differential signal pairs
with two sides provided with ground terminals, finally facilitating
same impedance of the two different differential signal pairs, thus
solving the deficiency of impedance not matching of the electrical
connector.
[0010] To achieve the foregoing objective, the present invention
adopts the following technical solutions.
[0011] An electrical connector includes: an insulating body; and a
plurality of first terminals, accommodated in the insulating body,
and comprising a first differential signal pair, a second
differential signal pair, and a plurality of first ground
terminals, wherein the first differential signal pair has a first
differential terminal and a second differential terminal, the
second differential signal pair has a third differential terminal
and a fourth differential terminal, the second differential
terminal is closer to the third differential terminal than the
first differential terminal, one of the first ground terminals
exists between and is adjacent to the second differential terminal
and the third differential terminal, no ground terminal is provided
at a side of the first differential terminal away from the second
differential terminal, another one of the first ground terminals is
provided at a side of the fourth differential terminal away from
the third differential terminal, and a distance between the second
differential terminal and the one of the first ground terminals
adjacent thereto is less than a distance between the third
differential terminal and the one of the first ground terminals
adjacent thereto.
[0012] In certain embodiments, each of the first differential
terminal and the second differential terminal has a first front
portion at least partially exposed out of the insulating body, a
first connecting portion connected to the first front portion and
retained to the insulating body, and a first soldering portion
connected to the first connecting portion, each of the third
differential terminal and the fourth differential terminal has a
second front portion at least partially exposed out of the
insulating body, a second connecting portion connected to the
second front portion and retained to the insulating body, and a
second soldering portion connected to the second connecting
portion, and a distance between the first front portion of the
second differential terminal and the one of the first ground
terminals adjacent thereto is less than a distance between the
second front portion of the third differential terminal and the one
of the first ground terminals adjacent thereto.
[0013] In certain embodiments, the first front portion comprises a
first contact portion and a first extending portion connected to
the first contact portion, the first extending portion is connected
to the first connecting portion, the second front portion comprises
a second contact portion and a second extending portion connected
to the second contact portion, the second extending portion is
connected to the second connecting portion, and a distance between
the first extending portion of the second differential terminal and
the one of the first ground terminals adjacent thereto is less than
a distance between the second extending portion of the third
differential terminal and the one of the first ground terminals
adjacent thereto.
[0014] In certain embodiments, a width of the first extending
portion is less than a width of the first contact portion, a width
of the second extending portion is less than a width of the second
contact portion, and the width of the first extending portion is
greater than the width of the second extending portion.
[0015] In certain embodiments, a chamfer exists between the first
extending portion and the first contact portion, the width of the
first extending portion is 0.6 to 0.9 times the width of the first
contact portion, and the width of the first extending portion is
smoothly reduced backward from front thereof.
[0016] In certain embodiments, a side edge of the first extending
portion close to the one of the first ground terminals adjacent
thereto extends straightly and then obliquely backward from front
thereof.
[0017] In certain embodiments, the insulating body has a base and a
tongue protruding out of the base, the first terminals are arranged
in a row and partially exposed to an upper surface of the tongue,
each of the first front portions is at least partially exposed to
the upper surface of the tongue, at least some of the second front
portions are exposed to the upper surface of the tongue, the first
connecting portion and the second connecting portion are retained
to the base, and a distance between the two first front portions is
less than a distance between the two second front portions.
[0018] In certain embodiments, the first front portion comprises a
first contact portion and a first extending portion connected to
the first contact portion, the first extending portion is connected
to the first connecting portion, the second front portion comprises
a second contact portion and a second extending portion connected
to the second contact portion, the second extending portion is
connected to the second connecting portion, the first extending
portion extends horizontally backward from a tail end of the first
contact portion, the first connecting portion bends and extends
backward and downward from a tail end of the first extending
portion, the first soldering portion bends and extends backward
from a tail end of the first connecting portion, the second contact
portion and the first contact portion are located at a same first
height of the tongue, the second extending portion and the first
extending portion are located at a same second height of the
tongue, and the second connecting portion and the second soldering
portion respectively overlap with projections of the first
connecting portion and the first soldering portion along an
arrangement direction of the first terminals.
[0019] In certain embodiments, the electrical connector further
includes a plurality of second terminals, wherein each of the
second terminals is alternately arranged with the first terminals,
the second terminals are arranged in a row and partially exposed to
a lower surface of the tongue, the second terminals comprise two
third differential signal pairs and a plurality of second ground
terminals, each of two sides of each of the third differential
signal pairs is provided with one of the second ground terminals,
each of the third differential signal pairs comprises two fifth
differential terminals, each of the fifth differential terminals
has a third front portion at least partially exposed to the lower
surface of the tongue, a third connecting portion connected to the
third front portion and retained to the base, and a third soldering
portion connected to the third connecting portion, the third front
portions of the two third differential signal pairs are located at
a same height of the tongue, the third connecting portion and the
third soldering portion respectively overlap with projections of
the first connecting portion and the first soldering portion along
the arrangement direction of the first terminals, a distance
between each of the fifth differential terminals and a
corresponding one of the second ground terminals adjacent thereto
is equal to the distance between the third differential terminal
and the one of the first ground terminals adjacent thereto, and is
greater than the distance between the second differential terminal
and the one of the first ground terminals adjacent thereto.
[0020] In certain embodiments, a width of the first differential
terminal is greater than a width of the fourth differential
terminal, or a width of the second differential terminal is greater
than a width of the third differential terminal.
[0021] An electrical connector includes: an insulating body; and a
plurality of first terminals, accommodated in the insulating body,
and comprising a first differential signal pair, a second
differential signal pair, and a plurality of first ground
terminals, wherein the first differential signal pair has a first
differential terminal and a second differential terminal, the
second differential signal pair has a third differential terminal
and a fourth differential terminal, the second differential
terminal is closer to the third differential terminal than the
first differential terminal, at least one of the first ground
terminals exists between the second differential terminal and the
third differential terminal, no ground terminal is provided at a
side of the first differential terminal away from the second
differential terminal, and another one of the first ground
terminals is provided at a side of the fourth differential terminal
away from the third differential terminal; wherein each of the
first differential terminal and the second differential terminal
has a first front portion at least partially exposed out of the
insulating body, a first connecting portion connected to the first
front portion and retained to the insulating body, and a first
soldering portion connected to the first connecting portion, each
of the third differential terminal and the fourth differential
terminal has a second front portion at least partially exposed out
of the insulating body, a second connecting portion connected to
the second front portion and retained to the insulating body, and a
second soldering portion connected to the second connecting
portion, and a width of a portion of the first front portion of the
second differential terminal exposed out of the insulating body is
greater than a width of a portion of the second front portion of
the third differential terminal exposed out of the insulating
body.
[0022] In certain embodiments, the first front portion comprises a
first contact portion and a first extending portion connected to
the first contact portion, the first extending portion is connected
to the first connecting portion, the second front portion comprises
a second contact portion and a second extending portion connected
to the second contact portion, the second extending portion is
connected to the second connecting portion, a width of the first
extending portion is less than a width of the first contact
portion, a width of the second extending portion is less than a
width of the second contact portion, and a width of a portion of
the first extending portion exposed out of the insulating body is
greater than a width of a portion of the second extending portion
exposed out of the insulating body.
[0023] In certain embodiments, a chamfer exists between the first
extending portion and the first contact portion, the width of the
first extending portion is 0.6 to 0.9 times the width of the first
contact portion, and the width of the first extending portion is
smoothly reduced backward from front thereof.
[0024] In certain embodiments, a distance between the two first
extending portions is less than a distance between the two second
extending portions.
[0025] An electrical connector includes: an insulating body; and a
plurality of first terminals, accommodated in the insulating body,
and comprising a first differential signal pair, a second
differential signal pair, and a plurality of first ground
terminals, wherein one side of the first differential signal pair
is not provided with any ground terminal, the first differential
signal pair has a first differential terminal and a second
differential terminal, each of two sides of the second differential
signal pair is provided with one of the first ground terminals, the
second differential signal pair has a third differential terminal
and a fourth differential terminal, and a distance between the
first differential terminal and the second differential terminal is
less than a distance between the third differential terminal and
the fourth differential terminal.
[0026] In certain embodiments, each of the first differential
terminal and the second differential terminal has a first front
portion at least partially exposed out of the insulating body, a
first connecting portion connected to the first front portion and
retained to the insulating body, and a first soldering portion
connected to the first connecting portion, each of the third
differential terminal and the fourth differential terminal has a
second front portion at least partially exposed out of the
insulating body, a second connecting portion connected to the
second front portion and retained to the insulating body, and a
second soldering portion connected to the second connecting
portion, and a distance between the two first front portions is
less than a distance between the two second front portions.
[0027] In certain embodiments, the first front portion comprises a
first contact portion and a first extending portion connected to
the first contact portion, the first extending portion is connected
to the first connecting portion, the second front portion comprises
a second contact portion and a second extending portion connected
to the second contact portion, the second extending portion is
connected to the second connecting portion, and a distance between
the two first extending portions is less than a distance between
the two second extending portions.
[0028] In certain embodiments, a width of the first extending
portion is less than a width of the first contact portion, a width
of the second extending portion is less than a width of the second
contact portion, and the width of the first extending portion of
the second differential terminal is greater than the width of the
second extending portion of the third differential terminal.
[0029] In certain embodiments, a chamfer exists between the first
extending portion and the first contact portion, the width of the
first extending portion is 0.6 to 0.9 times the width of the first
contact portion, and the width of the first extending portion is
smoothly reduced backward from front thereof.
[0030] In certain embodiments, the second differential terminal is
closer to the third differential terminal than the first
differential terminal, at least one of the first ground terminals
exists between the second differential terminal and the third
differential terminal, no ground terminal is provided at a side of
the first differential terminal away from the second differential
terminal, another one of the first ground terminals is provided at
a side of the fourth differential terminal away from the third
differential terminal, and a width of the first differential
terminal is greater than a width of the fourth differential
terminal, or a width of the second differential terminal is greater
than a width of the third differential terminal.
[0031] Compared with the related art, certain embodiments of the
present invention have the following beneficial effects.
[0032] By adjusting the structure of the first differential signal
pair to be different from the structure of the second differential
signal pair, which has the first ground terminals at two sides
thereof, the impedance of the first differential signal pair is
adjusted, such that the impedance of the first differential signal
pair and the impedance of the second differential signal pair are
identical to facilitate impedance matching without providing
additional grounding member to reduce the impedance of the first
differential signal pair, and the only adjustment is applied to the
existing terminal structure, such that the connector has a simple
structure, processing and assembling are simple, thus saving the
cost. Further, the first differential signal pair, which has a side
not provided with any ground terminal, the second differential
signal pair, which has both sides being provided with the first
ground terminals, and the third differential signal pair, which has
both sides being provided with the second ground terminals, are
provided differently, to prioritize on the premise that the
impedances of the two types of the differential signal pairs are
identical, and then to consider other issues such as crosstalk and
resonance, without considering all issues of the crosstalk,
resonance and impedances of all of the differential signal pairs of
the electrical connector altogether, thus reducing the design
difficulty, facilitating speeding of the production period, and
allowing the impedance matching to become better.
[0033] These and other aspects of the present invention will become
apparent from the following description of the preferred embodiment
taken in conjunction with the following drawings, although
variations and modifications therein may be effected without
departing from the spirit and scope of the novel concepts of the
disclosure.
BRIEF DESCRIPTION OF THE DRAWINGS
[0034] The accompanying drawings illustrate one or more embodiments
of the disclosure and together with the written description, serve
to explain the principles of the disclosure. Wherever possible, the
same reference numbers are used throughout the drawings to refer to
the same or like elements of an embodiment, and wherein:
[0035] FIG. 1 is a perspective exploded view of an electrical
connector according to certain embodiments of the present
invention.
[0036] FIG. 2 is a perspective assembled view of an electrical
connector according to certain embodiments of the present
invention.
[0037] FIG. 3 is a top view of an electrical connector according to
certain embodiments of the present invention with its shielding
shell being removed.
[0038] FIG. 4 is a bottom view of an electrical connector according
to certain embodiments of the present invention with its shielding
shell being removed.
[0039] FIG. 5 is a structural schematic view of a plurality of
first terminals and a plurality of second terminals according to
certain embodiments of the present invention.
[0040] FIG. 6 is a side view of FIG. 5.
[0041] FIG. 7 is a structural schematic view of a plurality of
first terminals according to certain embodiments of the present
invention.
DETAILED DESCRIPTION
[0042] The present invention is more particularly described in the
following examples that are intended as illustrative only since
numerous modifications and variations therein will be apparent to
those skilled in the art. Various embodiments of the invention are
now described in detail. Referring to the drawings, like numbers
indicate like components throughout the views. As used in the
description herein and throughout the claims that follow, the
meaning of "a", "an", and "the" includes plural reference unless
the context clearly dictates otherwise. Also, as used in the
description herein and throughout the claims that follow, the
meaning of "in" includes "in" and "on" unless the context clearly
dictates otherwise. Moreover, titles or subtitles may be used in
the specification for the convenience of a reader, which shall have
no influence on the scope of the present invention.
[0043] It will be understood that when an element is referred to as
being "on" another element, it can be directly on the other element
or intervening elements may be present therebetween. In contrast,
when an element is referred to as being "directly on" another
element, there are no intervening elements present. As used herein,
the term "and/or" includes any and all combinations of one or more
of the associated listed items.
[0044] Furthermore, relative terms, such as "lower" or "bottom" and
"upper" or "top," may be used herein to describe one element's
relationship to another element as illustrated in the Figures. It
will be understood that relative terms are intended to encompass
different orientations of the device in addition to the orientation
depicted in the Figures. For example, if the device in one of the
figures is turned over, elements described as being on the "lower"
side of other elements would then be oriented on "upper" sides of
the other elements. The exemplary term "lower", can therefore,
encompasses both an orientation of "lower" and "upper," depending
of the particular orientation of the figure. Similarly, if the
device in one of the figures is turned over, elements described as
"below" or "beneath" other elements would then be oriented "above"
the other elements. The exemplary terms "below" or "beneath" can,
therefore, encompass both an orientation of above and below.
[0045] As used herein, "around", "about" or "approximately" shall
generally mean within 20 percent, preferably within 10 percent, and
more preferably within 5 percent of a given value or range.
Numerical quantities given herein are approximate, meaning that the
term "around", "about" or "approximately" can be inferred if not
expressly stated.
[0046] As used herein, the terms "comprising", "including",
"carrying", "having", "containing", "involving", and the like are
to be understood to be open-ended, i.e., to mean including but not
limited to.
[0047] The description will be made as to the embodiments of the
present invention in conjunction with the accompanying drawings in
FIGS. 1-7. In accordance with the purposes of this invention, as
embodied and broadly described herein, this invention, in one
aspect, relates to an electrical connector.
[0048] FIG. 1 and FIG. 2 show an electrical connector 100 according
to certain embodiments of the present invention, which is used to
mate and match with a mating connector (not shown). The electrical
connector 100 is mounted on a circuit board (not shown). In this
embodiment, the electrical connector 100 is an electrical connector
transmitting high frequency signals, that is, a HDMI 2.1 connector.
In other embodiments, the electrical connector 100 may be other
connectors transmitting high frequency signals.
[0049] For convenience of description, the mating and matching
direction of the electrical connector 100 and the mating connector
is defined as a front-rear direction. The electrical connector 100
is mated forward with the mating connector.
[0050] As shown in FIG. 1, FIG. 3 and FIG. 4, the electrical
connector 100 includes an insulating body 1. A plurality of first
terminals 3 and a plurality of second terminals 4 are formed on the
insulating body 1 by one molding. The first terminals 3 and the
second terminals 4 are alternately arranged. A shielding shell 2
wraps outside the insulating body 1, and the shielding shell 2 and
the insulating body 1 form an insertion cavity 21 therebetween.
[0051] The insulating body 1 has a base 11 and a tongue 12
protruding out of the base 11. The tongue 12 is located in the
insertion cavity 21. The tongue 12 has an upper surface 121 and a
lower surface 122. The first terminals 3 are provided in a row and
partially exposed to the upper surface 121 of the tongue 12. The
second terminals 4 are provided in a row and partially exposed to
the lower surface 122 of the tongue 12.
[0052] As shown in FIG. 3, FIG. 5 and FIG. 6, the first terminals 3
include a first differential signal pair 31, a second differential
signal pair 32, and a plurality of first ground terminals 33. The
first differential signal pair 31 has a first differential terminal
311 and a second differential terminal 312, and the second
differential signal pair 32 has a third differential terminal 321
and a fourth differential terminal 322. The second differential
terminal 312 is closer to the third differential terminal 321 than
the first differential terminal 311. One of the first ground
terminals 33 exists between the second differential terminal 312
and the third differential terminal 321. No ground terminal is
provided at a side of the first differential terminal 311 away from
the second differential terminal 312. Another one of the first
ground terminals 33 is provided at a side of the fourth
differential terminal 322 away from the third differential terminal
321. Each of the first differential terminal 311 and the second
differential terminal 312 has a first front portion 313, where each
of the first front portions 313 is at least partially exposed out
of the upper surface 121 of the tongue 12, a first connecting
portion 314 connected to the first front portion 313 and retained
to the base 11, and a first soldering portion 315 connected to the
first connecting portion 314 and extending out of the base 11. Each
of the third differential terminal 321 and the fourth differential
terminal 322 has a second front portion 323 at least partially
exposed out of the upper surface 121 of the tongue 12, a second
connecting portion 324 connected to the second front portion 323
and retained to the base 11, and a second soldering portion 325
connected to the second connecting portion 324 and extending out of
the base 11.
[0053] As shown in FIG. 5 to FIG. 7, the first front portion 313
includes a first contact portion 3131 and a first extending portion
3132 extending horizontally backward from a tail end of the first
contact portion 3131. The first connecting portion 314 bends and
extends backward and downward from a tail end of the first
extending portion 3132. The first soldering portion 315 bends and
extends backward from a tail end of the first connecting portion
314. A virtual center axial line of the first contact portion 3131,
the first extending portion 3132, the first connecting portion 314
and the first soldering portion 315 of each of the first
differential terminal 311 and the second differential terminal 312
is located on a same plane, facilitating the identical signal
transmission of the first differential signal pair 31, reducing the
fluctuation of the signal transmission, and reducing the effect
causing the impedance to increase due to the fluctuation of the
virtual center axial lines of the first differential terminal 311
and the second differential terminal 312. The second front portion
323 includes a second contact portion 3231 and a second extending
portion 3232 extending horizontally backward from a tail end of the
second contact portion 3231. The second connecting portion 324
bends and extends backward and downward from a tail end of the
second extending portion 3232. The second soldering portion 325
bends and extends backward from a tail end of the second connecting
portion 324. The second contact portion 3231 and the first contact
portion 3131 are located at a same first height of the tongue 12,
and the second extending portion 3232 and the first extending
portion 3132 are located at a same second height of the tongue 12.
In this embodiment, the first height is equal to the second height.
In other embodiments, the first height and the second height may be
different from each other. The second connecting portion 324 and
the second soldering portion 325 respectively overlap with
projections of the first connecting portion 314 and the first
soldering portion 315 along an arrangement direction of the first
terminals 3.
[0054] As shown in FIG. 7, a distance between the first extending
portion 3132 of the second differential terminal 312 and the first
ground terminal 33 adjacent thereto is less than a distance between
the second extending portion 3232 of the third differential
terminal 321 and the first ground terminal 33 adjacent thereto. The
distance a1 between the first extending portion 3132 of the second
differential terminal 312 and the first ground terminal 33 adjacent
thereto is 0.67 mm, and the distance a2 between the second
extending portion 3232 of the third differential terminal 321 and
the first ground terminal 33 adjacent thereto is 0.7 mm. The first
front portion 313 and the second front portion 323 are the portions
to be contacted with a mating terminal, and affect the impedance
more. By adjusting the distance between the first front portion 313
of the second differential terminal 312 and the first ground
terminal 33 adjacent thereto, the impedance may be significantly
adjusted. In addition, the first contact portion 3131 is the
portion to be firstly contacted with the mating terminal and
affects the impedance more than the first extending portion 3132,
thus being easily affected by the processing tolerance. If the
first contact portion 3131 is adjusted, it is difficult to control
the variation value of the impedance, such that the impedance of
the first differential signal pair 31 and the impedance of the
second differential signal pair 32 may easily not match, thus
affecting the transmission of the high frequency signals. Adjusting
the first extending portion 3132 may cause a relatively smaller
variation value of the impedance, and the impedance of the first
extending portion 3132 may be adjusted easily to an ideal value,
such that the adjustment may be controlled against the processing
tolerance, the adjustment is controlled, which is convenient for
design and processing. In other embodiments, it is also possible
that a distance between the first contact portion 3131 of the
second differential terminal 312 and the first ground terminal 33
adjacent thereto is less than a distance between the second contact
portion 3231 of the third differential terminal 321 and the first
ground terminal 33 adjacent thereto, or that a distance between the
first connecting portion 314 of the second differential terminal
312 and the first ground terminal 33 adjacent thereto is less than
a distance between the second connecting portion 324 of the third
differential terminal 321 and the first ground terminal 33 adjacent
thereto. By making the distance between the second differential
terminal 312 and the first ground terminal 33 adjacent thereto be
less than the distance between the third differential terminal 321
and the first ground terminal 33 adjacent thereto, the impedance of
the first differential signal pair 31 is reduced, such that the
impedance of the first differential signal pair 31 and the
impedance of the second differential signal pair 32 are identical,
thus remedying the deficiency that the impedance of the first
differential signal pair 31 is large due to one side of the first
differential signal pair 31 not having any ground terminal 5.
[0055] As shown in FIG. 7, a width of the first extending portion
3132 is less than a width of the first contact portion 3131, a
width of the second extending portion 3232 is less than a width of
the second contact portion 3231, the width of the first extending
portion 3132 is greater than the width of the second extending
portion 3232, the width of the first extending portion 3132 of the
second differential terminal 312 is greater than the width of the
second extending portion 3232 of the third differential terminal
321, and the width of the first extending portion 3132 of the first
differential terminal 311 is greater than the width of the second
extending portion 3232 of the fourth differential terminal 322. To
prevent the structure of the first differential terminal 311 from
greatly changing, a chamfer exists between the first extending
portion 3132 and the first contact portion 3131, the width of the
first extending portion 3132 is provided to be 0.6 to 0.9 times the
width of the first contact portion 3131, and the width of the first
extending portion 3132 is smoothly reduced backward from front
thereof, thus facilitating the fluency of the signal transmission,
facilitating reducing impedance and preventing from excessive
impedance variation to generate signal reflection, and facilitating
improvement of the high frequency transmission effect. The widths
of the first contact portions 3131 of the first differential
terminal 311 and the second differential terminal 312 are both 0.5
mm, and the widths c1 of the first extending portions 3132 of the
first differential terminal 311 and the second differential
terminal 312 are both 0.36 mm, which is 0.72 times the width of the
first contact portion 3131. The widths of the second contact
portions 3231 of the third differential terminal 321 and the fourth
differential terminal 322 are both 0.5 mm, and the widths c2 of the
second extending portions 3232 of the third differential terminal
321 and the fourth differential terminal 322 are both 0.3 mm. At
this time, the impedance is adjusted altogether according to the
distance between the second differential terminal 312 and the first
ground terminal 33 adjacent thereto, and by having the width of the
first extending portion 3132 of the second differential terminal
312 greater than the width of the second extending portion 3232 of
the third differential terminal 321, such that the adjustment
methods are increased and become more controlled, preventing the
distance between the second differential terminal 312 and the first
ground terminal 33 adjacent thereto from being too small, or
preventing the width of the first extending portion 3132 from being
too wide, facilitating reducing the change of the terminal
structure, facilitating the fluency of the signal transmission,
facilitating reducing impedance, and allowing the distance between
terminals to be more reasonable, which is convenient for processing
and mounting. In other embodiments, it is possible that the width
of other portions of the first differential terminal 311 is greater
than the width of corresponding portions of the fourth differential
terminal 322, and/or that the width of other portions of the second
differential terminal 312 is greater than the width of the
corresponding portions of the third differential terminal 321. The
other portions and corresponding portions may be, for example, the
first contact portion 3131 corresponding to the second contact
portion 3231, the first connecting portion 314 corresponding to the
second connecting portion 324, and the first soldering portion 315
corresponding to the second soldering portion 325.
[0056] As shown in FIG. 3, a width of a portion of the first
extending portion 3132 of the second differential terminal 312
exposed out of the tongue 12 is greater than a width of a portion
of the second extending portion 3232 of the third differential
terminal 321 exposed out of the tongue 12, and a width of a portion
of the first extending portion 3132 of the first differential
terminal 311 exposed out of the tongue 12 is greater than a width
of a portion of the second extending portion 3232 of the fourth
differential terminal 322 exposed out of the tongue 12. Since the
dielectric coefficient of air is greater than the dielectric
coefficient of the insulating body 1, when the width of a portion
of the first extending portion 3132 exposed out of the tongue 12 is
greater than the width of a portion of the second extending portion
3232 exposed out of the tongue 12, the corresponding portion of the
first extending portion 3132 exposed in the air is more than that
of the second extending portion 3232, and the impedance becomes
correspondingly smaller. At this time, the portion of the first
extending portion 3132 exposed in the air has a smaller impedance
than that of the second extending portion 3232, and the width of
the first extending portion 3132 by itself is greater than the
width of the second extending portion 3232, such that the impedance
is further reduced. By reducing the impedance in both ways, the
change of the terminal structure due to other methods for reducing
the impedance of the first differential signal pair 31 is reduced,
and there may be no need to use the other methods to reduce the
impedance, such that the terminal structure of the first
differential signal pair 31 is not greatly changed, ensuring the
fluency of the signal transmission of the first differential signal
pair 31, facilitating reducing impedance and preventing from
excessive impedance variation to generate signal reflection,
facilitating the identical signal transmission of other
differential signal pairs, and improving the high frequency
transmission effect.
[0057] As shown in FIG. 7, a distance between the two first
extending portions 3132 is less than a distance between the two
second extending portions 3232, combined with the impedance
adjusting methods as described above to adjust the impedance of the
first differential signal pair 31 altogether, such that the
impedance of the first different signal pair 31 is reduced and the
structure thereof does not require to be changed significantly,
thus facilitating the fluency of the signal transmission,
facilitating reducing impedance and preventing from excessive
impedance variation to generate signal reflection, and facilitating
improvement of the high frequency transmission effect. The distance
between the two first extending portions 3132 is 0.64 mm, and the
distance between the two second extending portions 3232 is 0.7 mm.
In other embodiments, it is possible that the distance between
other portions of the first differential terminal 311 and the
second differential terminal 312 is less than the distance between
the corresponding portions of the third differential terminal 321
and the fourth differential terminal 322. The other portions and
corresponding portions may be, for example, the first contact
portion 3131 corresponding to the second contact portion 3231, the
first connecting portion 314 corresponding to the second connecting
portion 324, and the first soldering portion 315 corresponding to
the second soldering portion 325.
[0058] As shown in FIG. 3, FIG. 5 and FIG. 7, a side edge of the
first extending portion 3132 close to the first ground terminal 33
adjacent thereto extends first straightly and then obliquely
backward from front thereof, such that the side edge of the first
extending portion 3132 close to the first ground terminal 33
adjacent thereto has less change in it shape, reducing the times of
the impedance changes while reducing the impedance, and reducing
the signal reflection, thus improving the high frequency
transmission effect. In addition, in adjusting the impedance, a
distance from the straightly extending portion and the obliquely
extending portion of the side edge to the first ground terminal 33
adjacent thereto may correspondingly increase or decrease, and the
length of each of the straightly extending portion and the
obliquely extending portion of the side edge may also change, thus
further adjusting the impedance of the first differential terminal
311. The side edge is in a regular shape which extends first
straightly and then obliquely, and the impedance change is in a
regular pattern, which is convenient to control the impedance
change value, facilitating fine tuning of the impedance, and
achieving the ideal impedance value. The two side edges of the
first extending portion 3132 are provided to be symmetrical about a
virtual center axial line of the first extending portion 3132, and
both extend first straightly backward from front thereof and then
obliquely toward the virtual center axial line of the first
extending portion 3132, until a width of the back end of the first
extending portion 3132 and a width of the front end of the first
connecting portion 314 are identical, such that the overall shape
of the first extending portion 3132 is smoothly reduced backward
from front thereof, and the change of shape is less. In other
embodiments, the side edge of the first extending portion 3132 may
be a curved shape, or may be a combination of multiple curves, or a
combination of a curve and a straight line, etc., and is not
limited herein.
[0059] As shown in FIG. 4, the second terminals 4 include two third
differential signal pairs 41 and a plurality of second ground
terminals 42. Each of two sides of each of the third differential
signal pairs 41 is provided with one of the second ground terminals
42. Each of the third differential signal pairs 41 includes two
fifth differential terminals 411. Each of the fifth differential
terminals 411 has a third front portion 412 partially exposed to
the lower surface 122 of the tongue 12, a third connecting portion
413 connected to the third front portion 412 and retained to the
base 11, and a third soldering portion 414 connected to the third
connecting portion 413. The third front portions 412 of the two
third differential signal pairs 41 are located at a same height of
the tongue 12. The third connecting portion 413 and the third
soldering portion 414 respectively overlap with projections of the
first connecting portion 314 and the first soldering portion 315
along the arrangement direction of the first terminals 3. The
second contact portion 3231 and the first contact portion 3131 are
located at a same first height of the tongue 12, and the second
extending portion 3232 and the first extending portion 3132 are
located at a same second height of the tongue 12. In this
embodiment, the first height is equal to the second height. In
other embodiments, the first height and the second height may be
different from each other. The second connecting portion 324 and
the second soldering portion 325 respectively overlap with
projections of the first connecting portion 314 and the first
soldering portion 315 along the arrangement direction of the first
terminals 3, the third front portions 412 of the two third
differential signal pairs 41 are located at the same height of the
tongue 12, and the third connecting portion 413 and the third
soldering portion 414 respectively overlap with projections of the
first connecting portion 314 and the first soldering portion 315
along the arrangement direction of the first terminals 3, thus
facilitating the one molding of the first terminals 3, the second
terminals 4 and the insulating body 1, reducing the processing
cost, and facilitating the identical signal transmission of the
differential signal pairs.
[0060] As shown in FIG. 3 and FIG. 4, a distance between the two
fifth differential terminals 411 of one of the third differential
signal pairs 41 is equal to a distance between the two fifth
differential terminals 411 of the other of the third differential
signal pairs 41. A distance between the two third front portions
412 of each of the third differential signal pairs 41 is equal to
the distance between the two second front portions 323, and is
greater than the distance between the two first front portions 313.
A distance between each of the fifth differential terminals 411 and
the second ground terminal 42 adjacent thereto is equal to the
distance between the third differential terminal 321 and the first
ground terminal 33 adjacent thereto, and is greater than the
distance between the second differential terminal 312 and the first
ground terminal 33 adjacent thereto. A width of each of the fifth
differential terminals 411 is identical to the width of each of the
corresponding third differential terminal 321 and the fourth
differential terminal 322.
[0061] In addition, it should be noted that, in other embodiments,
it is also possible only having width of the first extending
portion 3132 of the second differential terminal 312 greater than
the width of the second extending portion 3232 of the third
differential terminal 321, and/or having the width of the first
extending portion 3132 of the first differential terminal 311
greater than the width of the second extending portion 3232 of the
fourth differential terminal 322. Alternatively, it is possible
only having the width of a portion of the first extending portion
3132 of the second differential terminal 312 exposed out of the
insulating body 1 greater than the width of a portion of the second
extending portion 3232 of the third differential terminal 321
exposed out of the insulating body 1, and/or having the width of a
portion of the first extending portion 3132 of the first
differential terminal 311 exposed out of the insulating body 1
greater than the width of a portion of the second extending portion
3232 of the fourth differential terminal 322 exposed out of the
insulating body 1. Alternatively, it is possible only having a
distance between the first differential terminal 311 and the second
differential terminal 312 less than a distance between the third
differential terminal 321 and the fourth differential terminal 322.
Alternatively, the methods described above may be otherwise
combined differently from the embodiments as described. By having
multiple methods to adjust the impedance of the first differential
signal pair 31, the adjustment may be more controlled, structural
design of the terminals may be more reasonable, reducing the change
of the structure of the first differential terminal 311,
facilitating the fluency of the signal transmission, facilitating
reducing impedance and preventing from excessive impedance
variation to generate signal reflection, and facilitating
improvement of the high frequency transmission effect. By adjusting
the structure of the first differential signal pair 31 to be
different from the structures of the second differential signal
pair 32 which respectively have the first ground terminals 33 at
two sides thereof and/or the third differential signal pair 41
which respectively have the second ground terminals 42 at two sides
thereof, the impedance of the first differential signal pair 31 is
adjusted, such that the impedance of the first differential signal
pair 31 and the impedance of the second differential signal pair 32
and/or the impedance of the third differential signal pair 41 are
identical to facilitate impedance matching without providing
additional grounding member to reduce the impedance of the first
differential signal pair 31, and the only adjustment is applied to
the existing terminal structure, such that the connector has a
simple structure, processing and assembling are simple, thus saving
the cost. Further, the first differential signal pair 31, which has
a side not provided with any ground terminal, and the second
differential signal pair 32, which respectively have both sides
being provided with the first ground terminals 33, and the third
differential signal pair 41, which respectively have both sides
being provided with the second ground terminals 42, are provided
differently, to prioritize on the premise that the impedances of
the two types of the differential signal pairs are identical, and
then to consider other issues such as crosstalk and resonance,
without considering all issues of the crosstalk, resonance and
impedances of all of the differential signal pairs of the
electrical connector altogether, thus reducing the design
difficulty, facilitating speeding of the production period, and
allowing the impedance matching to become better. Accordingly, the
values of a1, b1, c1 in FIG. 7 are the result obtained by adjusting
the issues such as crosstalk, resonance, stable signal
transmission, etc. to the first differential signal pair 31, the
second differential signal pair 32 and the third differential
signal pair 41 on the premise ensuring that the impedances of the
first differential signal pair 31, the second differential signal
pair 32 and the third differential signal pair 41 are identical,
thus meeting the HDMI 2.1 standard and requirement.
[0062] To sum up, the electrical connector according to certain
embodiments of the present invention has the following beneficial
effects:
[0063] (1) By making the distance between the second differential
terminal 312 and the first ground terminal 33 adjacent thereto be
less than the distance between the third differential terminal 321
and the first ground terminal 33 adjacent thereto, the impedance of
the first differential signal pair 31 is reduced, such that the
impedance of the first differential signal pair 31 and the
impedance of the second differential signal pair 32 are identical,
thus remedying the deficiency that the impedance of the first
differential signal pair 31 is large due to one side of the first
differential signal pair 31 not having any ground terminal 5.
[0064] (2) The first front portion 313 and the second front portion
323 are the portions to be contacted with the mating terminal, and
affect the impedance more. Thus, the distance between the first
front portion 313 of the second differential terminal 312 and the
first ground terminal 33 adjacent thereto is less than the distance
between the second front portion 323 of the third differential
terminal 321 and the first ground terminal 33 adjacent thereto,
such that the impedance of the first differential signal pair 31 is
significantly reduced, thus achieving better impedance adjusting
effect.
[0065] (3) The distance between the first extending portion 3132 of
the second differential terminal 312 and the first ground terminal
33 adjacent thereto is less than the distance between the second
extending portion 3232 of the third differential terminal 321 and
the first ground terminal 33 adjacent thereto. The first contact
portion 3131 is the portion to be firstly contacted with the mating
terminal and affects the impedance more than the first extending
portion 3132, thus being easily affected by the processing
tolerance. If the first contact portion 3131 is adjusted, it is
difficult to control the variation value of the impedance, such
that the impedance of the first differential terminal 311 and the
impedance of the second differential terminal 312 may easily not
match, thus affecting the transmission of the high frequency
signals. Adjusting the first extending portion 3132 may cause a
relatively smaller variation value of the impedance, and the
impedance of the first extending portion 3132 may be adjusted
easily to an ideal value, such that the adjustment may be
controlled against the processing tolerance, the adjustment is
controlled, which is convenient for design and processing.
[0066] (4) On the basis that the impedance of the first
differential signal pair 31 is reduced by having the distance
between the first extending portion 3132 of the second differential
terminal 312 and the first ground terminal 33 adjacent thereto less
than the distance between the second extending portion 3232 of the
third differential terminal 321 and the first ground terminal 33
adjacent thereto, the width of the first extending portion 3132 of
the second differential terminal 312 is greater than the width of
the second extending portion 3232 of the third differential
terminal 321, and the width of the first extending portion 3132 of
the first differential terminal 311 is greater than the width of
the second extending portion 3232 of the fourth differential
terminal 322, thus facilitating the adjusting of the first
differential signal pair 31, reducing the impedance of the first
differential signal pair 31, such that the adjustment methods are
increased and become more controlled, preventing the distance
between the second differential terminal 312 and the first ground
terminal 33 adjacent thereto from being too small, or preventing
the width of the first extending portion 3132 from being too wide,
facilitating reducing the change of the terminal structure,
facilitating the fluency of the signal transmission, facilitating
reducing impedance, and allowing the distance between terminals to
be more reasonable, which is convenient for processing and
mounting.
[0067] (5) A chamfer exists between the first extending portion
3132 and the first contact portion 3131, thus forming a buffer,
reducing the change of the structure of the first differential
terminal 311. Further, the width of the first extending portion
3132 is 0.6 to 0.9 times the width of the first contact portion
3131, and the width of the first extending portion 3132 is smoothly
reduced backward from front thereof, thus preventing the structures
of the first extending portion 3132 and the first contact portion
3131 from greatly changing, facilitating the fluency of the signal
transmission, facilitating reducing impedance and preventing from
excessive impedance variation to generate signal reflection, and
facilitating improvement of the high frequency transmission
effect.
[0068] (6) A side edge of the first extending portion 3132 close to
the first ground terminal 33 adjacent thereto extends first
straightly and then obliquely backward from front thereof, such
that the side edge of the first extending portion 3132 close to the
first ground terminal 33 adjacent thereto has less change in it
shape, reducing the times of the impedance changes while reducing
the impedance, and reducing the signal reflection, thus improving
the high frequency transmission effect. In addition, in adjusting
the impedance, a distance from the straightly extending portion and
the obliquely extending portion of the side edge to the first
ground terminal 33 adjacent thereto may correspondingly increase or
decrease, and the length of each of the straightly extending
portion and the obliquely extending portion of the side edge may
also change, thus further adjusting the impedance of the first
differential terminal 311. The side edge is in a regular shape
which extends first straightly and then obliquely, and the
impedance change is in a regular pattern, which is convenient to
control the impedance change value, facilitating fine tuning of the
impedance, and achieving the ideal impedance value.
[0069] (7) On the basis that the impedance of the first
differential signal pair 31 is reduced by having the distance
between the first extending portion 3132 of the second differential
terminal 312 and the first ground terminal 33 adjacent thereto less
than the distance between the second extending portion 3232 of the
third differential terminal 321 and the first ground terminal 33
adjacent thereto, and/or on the basis that the width of the first
extending portion 3132 of the second differential terminal 312 is
greater than the width of the second extending portion 3232 of the
third differential terminal 321, and the width of the first
extending portion 3132 of the first differential terminal 311 is
greater than the width of the second extending portion 3232 of the
fourth differential terminal 322, further having the width of the
first differential terminal 311 greater than the width of the
fourth differential terminal 322, and/or having the width of the
second differential terminal 312 greater than the width of the
third differential terminal 321. By two or more of the impedance
adjustment methods, the impedance of the first differential signal
pair 31 is reduced altogether, thus preventing from a single
adjustment to cause the terminal structures of the first
differential signal pair 31 to greatly change, facilitating the
fluency of the signal transmission, facilitating reducing
impedance, and allowing the distance between terminals to be more
reasonable, which is convenient for processing and mounting, such
that the impedance adjustment becomes more controlled.
[0070] (8) Since the dielectric coefficient of air is greater than
the dielectric coefficient of the insulating body 1, when the width
of a portion of the first front portion 313 of the second
differential terminal 312 exposed out of the insulating body 1 is
greater than the width of a portion of the second front portion 323
of the third differential terminal 321 exposed out of the
insulating body 1, the corresponding portion of the first front
portion 313 exposed in the air is more than that of the second
front portion 323, and the impedance becomes correspondingly
smaller. At this time, the portion of the first front portion 313
exposed in the air has a smaller impedance than that of the second
front portion 323, and the width of the first front portion 313 by
itself is greater than the width of the second front portion 323,
such that the impedance is further reduced. By reducing the
impedance in both ways, the change of the terminal structure due to
other methods for reducing the impedance of the first differential
signal pair 31 is reduced, and there may be no need to use the
other methods to reduce the impedance, such that the terminal
structure of the first differential signal pair 31 is not greatly
changed, ensuring the fluency of the signal transmission of the
first differential signal pair 31, facilitating reducing impedance
and preventing from excessive impedance variation to generate
signal reflection, facilitating improvement of the high frequency
transmission effect and the identical signal transmission of other
differential signal pairs, and improving the high frequency
transmission effect. In addition, the first front portion 313 and
the second front portion 323 are the portions to be contacted with
the ground terminal, thus easily and significantly affecting the
impedance adjustment, and further preventing the first differential
signal pair 31 from greatly changing. Thus, the impedance of the
first differential signal pair 31 and the impedance of the second
differential signal pair 32 are identical, thus remedying the
deficiency that the impedance is not identical due to one side of
the first differential signal pair 31 not having any ground
terminal.
[0071] (9) By having the distance between the first differential
terminal 311 and the second differential terminal 312 less than the
distance between the third differential terminal 321 and the fourth
differential terminal 322, the impedance of the first differential
signal pair 31 is adjusted, such that the impedance of the first
differential signal pair 31 and the impedance of the second
differential signal pair 32 are identical, thus remedying the
deficiency that the impedance is not identical due to one side of
the first differential signal pair 31 not having any ground
terminal.
[0072] The foregoing description of the exemplary embodiments of
the invention has been presented only for the purposes of
illustration and description and is not intended to be exhaustive
or to limit the invention to the precise forms disclosed. Many
modifications and variations are possible in light of the above
teaching.
[0073] The embodiments were chosen and described in order to
explain the principles of the invention and their practical
application so as to activate others skilled in the art to utilize
the invention and various embodiments and with various
modifications as are suited to the particular use contemplated.
Alternative embodiments will become apparent to those skilled in
the art to which the present invention pertains without departing
from its spirit and scope. Accordingly, the scope of the present
invention is defined by the appended claims rather than the
foregoing description and the exemplary embodiments described
therein.
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